Figure: Molecular structure of PBDEs
ALS offering for PBDE testing
|
Matrix |
LOQ |
Sample volume |
|
Soil/Sediment/Ash/Waste |
1100 pg/g dw Sum of BDE of primary interest |
5 g |
|
Water |
4600 pg/g Sum of BDE of primary interest |
1 L |
|
Biota - food |
1000 pg/g of fat Sum of BDE of primary interest |
|
|
Biota - feed |
200 pg/g Sum of BDE of primary interest |
|
|
Clinical samples (Blood, serum) |
20000 pg/g of fat Sum of BDE of primary interest |
For 50 g of blood sample or for 30 g of serum |
Commercial products are a mixture of congeners, with Penta-, Octa- and DecaBDE being the ones most frequently used.
RoHS has limited the allowed concentration of PBDE’s in products at 1 g/kg similar to PBB’s. Tetra-, penta-, hexa- and heptaBDe are all included on the list of POP’s under the Stockholm convention.
Toxicity
PBDE’s are ndocrine disruptors and neurotoxins in addition to having a negative effect on reproduction, liver and thyroid.
These compounds are classified as “alleged carcinogens in humans”
Table: International threshold values for PBDE
|
Country |
Matrix |
Limit |
|
Norway |
Sediment |
62-16000 µg/kg-1 |
|
Norway |
Water |
0.53-2.8 µg/l-1 |
1. 2229/2007 Norwegian Pollution Control Agency. Limit depending on classification
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